The Builder is where agent teams are made and changed. Agents → New agent starts a fresh team; Open in builder on any team's card continues an existing one.
Two panels, one conversation
The chat sits on the left; the Live preview canvas on the right draws the team as it takes shape — new agents, transfers and connections stream in as the assistant works, and while a change is still in motion the canvas softens under an assistant is editing — provisional chip. Tapping any agent node opens its editor drawer without leaving the page. On narrower screens the two panels become a Chat / Canvas tab pair.
The composer takes typed or dictated input — the mic button toggles dictation, and the transcript appears as editable text before anything is sent. Suggestion chips above it seed common asks. When the assistant needs an answer, the question and its option pills dock into the composer itself; a typed reply works as well as a tap.
AI edit and Plain view
A segmented control at the top right switches between AI edit — chat and canvas side by side — and Plain view, a full-width read-only graph with a legend explaining every node and line. Which view a team opens in follows Settings → Preferences (Open agents with AI chat editor, on by default).
Everything autosaves
There is no Save button. Every change — the user's or the assistant's — autosaves into a draft, and real callers stay on the live version until Go live is pressed. Closing the tab loses nothing: the conversation survives leaving and returning. See Drafts, versions & going live.
The action bar
After a change lands, the action bar offers the next moves: Test opens a browser test call, Agent review asks an independent AI reviewer to critique the whole team, Continue keeps editing, and Go live publishes the draft to callers.
It already knows the business
Once website knowledge has finished its first crawl, the Builder starts every conversation with a brief on the company — what it does, how it talks, how to reach it — and it can wire a knowledge base onto agents so they answer from the organisation's own content.
The Builder never changes anything silently. It proposes in plain language and waits for confirmation — see Describe what you want.